Chapter 1. Postinstallation configuration overview
After installing OpenShift Container Platform, a cluster administrator can configure and customize the following components:
- Machine
- Bare metal
- Cluster
- Node
- Network
- Storage
- Users
- Alerts and notifications
1.1. Post-installation configuration tasks
You can perform the post-installation configuration tasks to configure your environment to meet your need.
The following lists details these configurations:
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Configure operating system features: The Machine Config Operator (MCO) manages
MachineConfigobjects. By using the MCO, you can configure nodes and custom resources. Configure cluster features. You can modify the following features of an OpenShift Container Platform cluster:
- Image registry
- Networking configuration
- Image build behavior
- Identity provider
- The etcd configuration
- Machine set creation to handle the workloads
- Cloud provider credential management
Configuring a private cluster: By default, the installation program provisions OpenShift Container Platform by using a publicly accessible DNS and endpoints. To make your cluster accessible only from within an internal network, configure the following components to make them private:
- DNS
- Ingress Controller
- API server
Perform node operations: By default, OpenShift Container Platform uses Red Hat Enterprise Linux CoreOS (RHCOS) compute machines. You can perform the following node operations:
- Add and remove compute machines.
- Add and remove taints and tolerations.
- Configure the maximum number of pods per node.
- Enable Device Manager.
- Configure users: OAuth access tokens allow users to authenticate themselves to the API. You can configure OAuth to perform the following tasks:
- Specify an identity provider
- Use role-based access control to define and supply permissions to users
- Install an Operator from OperatorHub
- Configuring alert notifications: By default, firing alerts are displayed on the Alerting UI of the web console. You can also configure OpenShift Container Platform to send alert notifications to external systems.
